The compressed straw-based boards are produced by bonding straws with natural adhesive (or self-bonding), synthetic resin,and inorganic cementing material at room temperature or high temperature. Evon et al. [8] manufactured new thermal insula-tion fiber boards by thermo-pressing from sunflower mixed with proteins and lignocellulosic fibers, acting respectively as binder and reinforcing fillers in what could be considered as a natural composite. The result showed that the heat insulation properties improved with decreasing fiberboard density, and thermal con-ductivity of the least dense fiberboard was only 0.0885 W/(m K)at 25◦C. Mati-Baouche et al.